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Parts for Whirlpool GU940SCGB2 Dishwasher - AppliancePartsPros.com

See the attachment for the tech sheet.

Have you tried removing power from the unit for a couple minutes to see if the control board will reset?

Sounds like a control panel (console/keypad) or a control board problem.

The usual way to troubleshoot this problem is to check the panel (keypad) switch outputs and then if it is OK replace the control board.
Unfortunately they do not publish the pin-outs for this keypad.

Try getting into diagnostics to see if it will help narrow down the cause.

Perhaps try the following cleaning procedure.
If that does nothing then I would replace the control board first as it seems to be the more likely cause from your description of the problem.

Connector Cleaning / Checking
Unplug the unit
Open it up
Remove the ribbon cable from the keypad to the control board at the control board.
Clean the edge connector. Use electronics contact cleaner or isopropyl alcohol.
If it is the type where there is not a connector just the insulation is removed, it can be cleaned with a pencil eraser. Do not use an ink eraser as it is too abrasive.
Check the tracks in the ribbon cable for hairline cracks. A magnifying glass helps here.
Would not hurt to clean the connector on the board. Use electronics contact cleaner or isopropyl alcohol and a tooth brush. Be gentle and do not reconnect till all the solvent evaporates.
Reconnect everything and give it a try.

The parts for this unit look pretty expensive so unless it is in very good shape you may just want to replace it.

[COLOR="Blue"]So, is this a console issue?[/COLOR]
I cannot be 100% sure but that also would be my conclusion.
It is hard to say because a wonky control board can do a lot of weird things.
Try shutting the power off to the unit and then see if the problems remain the same. Do this a couple times.
If they do I would go with the control panel.
If they change I would go with the control board.

If you decide to replace the control panel or control board, you may want to order it from AppliancePartsPros as they will let you return it if it does not fix the problem. See their return policy.
Most companies will not let you return electrical parts.

Please do not order both of the parts at once and just return the one that does not work. If people do this AppliancePartsPros would probably have to change their return policy and that would be a shame.